Good price / quality ratio 421

I read some comments after ordering the product quality, in particular yellowing. Too late!?
Finally, yes after a few weeks, I see the beautiful white has given way to a somewhat duller hue that contrasts with the white of my Samsung Galaxy S3 Mini.
Anyway frankly at this price ... We can not expect flawless. And as for me most about this product was to have a flexible protection with the phone, no regret eventually. Especially since his keys, watch, usb remains very easy to handle (even scooter, with gloves and phone in the pocket of the jacket!)
Without forgetting that this price was 2 screen protectors with !! ...